External USB 3 Hard Drive  as Scratch Disk

Hi All
Just wondering is it OK to use a External USB 3 500 GB Hard Drive as Scratch Disk. I have USB 3 ports on my PC and have internal hard drive also, but would it be OK to use the external drive as a scratch disk
Thanks in Advance
Ged

Perhaps you could do some benchmarking.
There are programs that can measure your drive's capability, or you can just copy a few big files to it and see how long it takes.
I suggest that if it can't reach a majority of 100 megabytes / second throughput for a sequential read / write, then it is probably not a good candidate.
-Noel

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